This Led Zeppelin Hermit t-shirt is officially licensed and manufactured by Hi Fidelity Entertainment. The front is screen printed on a black t-shirt made from 100% cotton.  No design is on the back.

Size,          Brand,        Armpit to Armpit, Top to Bottom
Medium     Tultex                    19"                   30"
Large         Led Zeppelin         20.5"                31"
X-Large     Led Zeppelin         22.5"                32"
2X-Large   Tultex                    24.5"                33"